Automotive & Engines

Basic

Torque from Force

Turning effect of a force applied at radius r.

Formula

\tau = F \times r

Live Calculator

Members

Variables

τTorque (N·m)

FForce (N)

rLever arm (m)

Example

200 N on a 0.3 m wrench: τ = 60 N·m

Did You Know?

A longer breaker bar multiplies your torque — the reason stubborn wheel nuts finally give way.

automotive torque mechanics

Share this formula

More in Automotive & Engines

Power from Torque & RPM

Engine power in kW from torque and rotational speed.

Horsepower from Torque (Imperial)

Horsepower from torque (lb-ft) and engine rpm.

Compression Ratio

Ratio of cylinder volume at bottom vs top of the stroke.

Engine Displacement

Total swept volume of all cylinders.

Gear Ratio

Ratio of driven to driving gear teeth.

Vehicle Speed from RPM

Road speed from engine rpm, gearing and tyre diameter.